NavList:

Andrés covered the datum question but I can't help posting the following reference I found with some distances included:

http://www.usni.org/magazines/proceedings/2002-02/warning-navigators-geodesy-datums-are-here
With the words of advice on reading an unfamiliar chart:
“Accompanying the note ( on the chart) may be an additional notation indicating that positions obtained from satellite navigation systems can be plotted directly on the chart without corrections. If the chart is a NIMA reproduction of a foreign chart based on a different (non-WGS) datum, it will have an additional note, such as "Positions obtained from satellite navigation systems referred to the WGS 84 datum must be moved 7.36 minutes northward and 3.65 minutes eastward to agree with this chart." And there may be other notations, giving corrections to other datums. On charts based on such early surveys that a conversion factor cannot be determined accurately, notes will say "Adjustments to WGS cannot be determined for this chart" or "From various sources to (year)," without reference to the WGS.”

Gary's question makes me wonder what a cross check of some of the old published coordinates of more convenient locations might yield. Right now I can't think of a good reason for CelNav in 1936 to read differently from CelNav today.
Regards, Noell

----------------------------------------------------------------
NavList message boards and member settings: www.fer3.com/NavList
Members may optionally receive posts by email.
To cancel email delivery, send a message to NoMail[at]fer3.com
----------------------------------------------------------------